<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <!--CDN引入方式-->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>

<div id="app">
    <h1>{{msg}}</h1>
    <h1 v-show="sign">{{msg1}}</h1>
    <h1 v-show="flag">{{msg2}}</h1>
</div>

</body>

<script src="../js/vue05.js" />
</html>